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Certainty Turf Herbicide

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Certainty Turf Herbicide manufactured by Monsanto is an excellent selective, post-emergent herbicide containing 75% Sulfosulfuron. Certainty is easy to use and has a broad label for weeds. Using spot treatments or broadcast application, Certainty provides excellent control of dallisgrass and yellow and purple Nutsedge. Certainty Turf Herbicide is very safe on residential and commercial turf and can be sprayed over St Augustine and bermudagrass without damaging it.

Certainty Turf Herbicide is pet and child safe once dry. Keep people off of treated areas until dry.

Target Pests

Certainty Turf Herbicide is a selective herbicide that controls a broad list of annual and perennial grass and broadleaf weeds in highly managed turf ornamental and native grass sites including but not limited to Nutsedge Virginia Buttonweed Dallisgrass (in bermudagrass) annual bluegrass Tall Fescue etc. Please consult product label for detailed list of targeted weeds and grasses that Certainty is effective against.

For Use In

Certainty Turf Herbicide may be applied to residential and commercial sites including apartment complexes athletic fields cemeteries golf course fairways golf course roughs golf course tees and other golf course areas hotel properties nurseries office complexes parks public areas retail sites storage facilities school grounds sod and turfgrass seed farms and other highly managed turfgrass sites. This product is NOT for use on golf course putting greens.


For spot spray applications of Certainty Turf Herbicide mix 1-2.5 scoops in 1 gallon of water.

  • 1 gallon of Certainty Turf Herbicide solution will treat 1,000 square feet.
  • For maximum effectiveness add a non-ionic surfactant to your solution.

Do not mow immediately after treating grasses with Certainty Turf Herbicide. Apply Certainty when dew, fog, mist, and rain are not present.

Coverage Area

Each 1.25 oz bottle of Certainty Turf Herbicide will treat anywhere from 10,000 sq. ft.up to 35,000 sq. ft. depending upon the application used

Time to Kill

This product is absorbed by both the roots and the foliage of plants and rapidly inhibits the growth of susceptible weeds. Susceptible weed growth stops withing 24 hours of treatment even though visual symptoms are slow to develop. Susceptible weeds usually show yellowing or browning within 2 to 3 weeks. Warm, moist conditions following application will accelerate herbicidal activity. Cold, dry conditions will delay herbicidal activity. Weeds stressed by drought are less susceptible to this product.

Mix Rate

1-2.5 scoops per gallon of Water

Active Ingredient

Sulfosulfuron 75%

Certainty Turf Herbicide

Certainty Turf Herbicide

Certainty Turf Herbicide is a high quality herbicide manufactured by Monsanto. Certainty is an excellent selective, post-emergent herbicide containing 75% Sulfosulfuron. Certainty is easy to use and has a broad label for weeds. Using spot treatments or broadcast application, Certainty provides excellent control of dallisgrass and yellow and purple Nutsedge. Certainty Turf Herbicide is very safe on residential and commercial turf and can be spryed over st augustine and bermuda grass without damaging it.

Certainty Herbicide Features

  • Controls sedges, grass and broadleaf weeds including purple and yellow nutsedge, Kyllinga species, along with globe and annual sedgeUse selectively on a wide range of warm-season turfgrass species
  • Offers flexibility to control difficult weeds in newly seeded turf, native grasses and established ornamentalsIdeal choice for spring transition to Bermudagrass turf from overseeded ryegrass
  • Keeps warm-season turf free of undesirable cool-season turfgrass such as tall fescue, perennial ryegrass, Poa annua and Poa trivialis

You can be "certain" that Certainty will get the job done against even the toughest of grassy or broadleaf weeds. Buy it today and get it shipped to your doorstep for free!

Product Q & A

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Browse 23 questions Browse 23 questions and 23 answers
How many fractions of an ounce is one scoop, or how many scoops of Certainty are there in 1.25 ounces? (1.25 ounces doesn't sound like much product for the price...)
ntex on Jul 14, 2017
BEST ANSWER: The rate for certainty is 0.8 grams per scoop.
Can I use this product to eliminate K-31 Tall Fescue in my Kentucky Bluegrass lawn, and if so, what should I expect in terms of damage to the KBG??
Cool K on Jul 7, 2018
BEST ANSWER: The Certainty Turf Herbicide is not listed for the use on Kentucky Bluegrass lawns and it will kill Annual Bluegrass.
Will this hurt the trees when spot treating for nut grass?
Crowbar on Jun 4, 2018
BEST ANSWER: No, Certainty will not harm the trees.
Can it be used on centipede ?
A shopper on May 2, 2018
BEST ANSWER: Yes, Certainty has been generally considered safe for centipede grass.
can I spray it on non rooted in sod?
A shopper on Mar 30, 2018
BEST ANSWER: Application to new sod? This product is labeled for use on Sod farms, I would be hesitant to apply to soon after you lay the new sod out. Wait till first cutting.
Did you use a non-ionic surfactant when mixing your Certainty Herbicide?
A shopper on May 23, 2018
BEST ANSWER: Yes, you will want to use a nonionic surfactant when applying the Certainty Turf Herbicide. The application will require at least .5 oz of surfactant per gallon of mixed solution.
Is this product safe to use on St. Augustine, Zoysia and centipede grasses?
B C on Aug 26, 2018
BEST ANSWER: Yes the product is safe to use on these grasses when applied according to label directions.
Is this product hazardous to animals?
A shopper on Aug 22, 2018
BEST ANSWER: Yes it is. Make sure when applying the product to keep animals away from the area until the product has fully dried.
i live in northern indiana and i have large areas of poa annua. can i spot treat the poa annua post emergence in the without killing the kentucky bluegrass?
A shopper on Jul 24, 2018
BEST ANSWER: Yes, you certainly can.
Will this product move if applied close to a bent grass green?
A shopper on Jun 18, 2018
BEST ANSWER: No, it should be fine if there is no over spray, and you did not have a wind.
Can I spray weeds in mondo grass ?
A shopper on Jun 8, 2018
BEST ANSWER: No you will not want to spray this in your Mondo grass. Can you tell me more about the weeds you are trying to control?
I have Johnson Grass in my Dwarf Fescue lawn. Will using Cerainty kill or at least control the Johnson grass without harming my lawn?
Dan G on Apr 17, 2018
BEST ANSWER: No you cannot use Certainty on your Fescue grass, to control Johnson Grass.
In tall fescue, there are no selective herbicides for post-emergent Johnsongrass control. Glyphosate can be spot applied or selectively applied.

I did see that you can use Outridder as a spot treatment with limited injury to your fescue lawn.

I need to reseed my lawn this spring. How soon after I apply Certainty can I reseed?
Larry on Mar 3, 2018
BEST ANSWER: I did not see any restrictions on re-seeding after application, I would wait at least 10 days after you apply the certainty.
Can Certainty be used to kill nutsedge in Liriope Muscarii?
A shopper on Dec 2, 2017
BEST ANSWER: Yes, Certainty can be applied as an over the top application of the Liriope, without harming the monkey grass and controlling the nutsedge.
will certainty kill tall fescue in blue grass?
jack w on Sep 3, 2017
BEST ANSWER: Best control of tall fescue is obtained when the product is applied at 1.25 ounces per acre followed by a second application of 1.25 ounces per acre at 21 to 28 days after he initial treatment.
What would be the hazards using this product around grapevines? I have Johnsongrass infestation between my trellises. Thanks.
Skulan on Jul 21, 2017
BEST ANSWER: It would kill the grapes if it comes in contact with the leaves of the grapevine.
I have a new lawn with Tall fescue growing in with regular fescue and Zoysia. Will using Certainty kill the tall fescue and noy harm the other good grasses?
Tony on Jun 26, 2017
BEST ANSWER: No, sorry that will not work.
How well does Certainty work on goose grass over Bermuda grass?
Ed on Jun 16, 2017
BEST ANSWER: Goosegrass is best controlled with preemergence herbicides. Herbicides that contain oxadiazon and then Post Emergent control you will want to look at Postemergence controls in bermudagrass includes foramsulfuron (Revolver). https://www.solutionsstores.com/revolver-herbicide
Will Certainty control weeds on a bentgrass green on a golf course in CA? If not can you use to control weeds on the fairways and tees?
Lindsay on May 31, 2017
BEST ANSWER: Broadleaf weed control in bentgrass You can use numerous herbicides to control broadleaf weeds in bentgrass turf. These include the phenoxy group, (2,4-D, dichlorprop, MCPA, MCPP, etc.), the benzoic acid group (dicamba) and the pyridinecarboxylic acid group (clopyralid, triclopyr).Certainty does not have bentgrass listed as a safe turf to apply to, I have included some suggestions.
I live in MN and our lawn is Kentucky Bluegrass. I have been infested with Quack grass. Will this product harm my Kentucky Bluegrass if used to get rid of my quackgrass. Thanks.
Dr Phil on May 15, 2017
BEST ANSWER: The product will definitely kill the quack grass. However, it is not labeled to be used on Kentucky bluegrass. The product will also kill Poa annua that is a weed of the same family and genus of the Kentucky bluegrass. You can contact the manufacture of this product for more information not listed on the label. Monsanto and the number is 314-694-1000
will certainty control quackgrass
Don on Apr 27, 2017
BEST ANSWER: Yes, Certainty will control quackgrass, rate is 1.25 to 2 ounce per gallon
Can Certainty Turf Herbicide bu used to control nut sedge in Asian jasmine?
Ron on Nov 7, 2016
BEST ANSWER: Yes Certainty will control nutsedge, but it would not be listed to work in Asian Jasmine, as this is specific for turf grass. Better to use Sedgehammer for the control of nutsedge in your ground cover.

I have 7 acres that is infested with nutsedge and button weed will this kill it and how much produce do I need? I use a 12 ft boom sprayer
A shopper on Jun 4, 2018

Customer Reviews

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Easy to Use
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Real value
Super easy to store, mix and apply with no mess. Ideal to control so many weeds in bermuda and saint augustine lawns, especially when temperatures climb in May and early June.
April 10, 2018

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